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A lens or optical system which offers to the eye the image originating from another system (the objective), at a suitable viewing distance. The...



= Encyclopedia Article; = Research Update
Eyepieces: (a) Ramsden and (b) Huygens. FL= field lens; EL= eye lens; FS= field stop; EP= exit pupil or eye point; IO= image (real or virtual) formed by the preceding system; IF= image (virtual or real) formed by the preceding system and the field lens.
From Encyclopedia article 'Eyepiece'